A shrimp grows in Stoughton. Actually, it’s more like 1,500 pounds of them. Miles from the ocean, in a nondescript industrial park, Pacific white shrimp are frolicking in 82-degree purified Atlantic seawater and getting plump on special feed. It’s warm in the room that houses five big open tanks. That’s the way these babies like it, and James Tran and Peter Howard, the masterminds behind Sky 8 Shrimp Farm, are determined to give them what they like. In turn, Tran and Howard hope to reap tremendous rewards when the shrimp are harvested and sold.